fix: iroiro

examples/basic.rs

@@ -0,0 +1,12 @@
+use voicevox_client::Client;
+
+#[tokio::main]
+async fn main() {
+    let client = Client::new("http://localhost:50021".to_string());
+    let audio_query = client
+        .create_audio_query("こんにちは", 1, None)
+        .await
+        .unwrap();
+    let audio = audio_query.synthesis(1).await.unwrap();
+    println!("audio: {:?}", audio);
+}